Equations for a ventilation design derived from computational fluid dynamics

Wan Ki Chow, Ling Tim Wong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

5 Citations (Scopus)


Computational fluid dynamics (CFD) was used in a study of the air flow characteristics in the occupied building zone. Correlation equations between the mean air speeds and the percentage dissatisfied with the macroscopic flow numbers were derived. Ten macroscopic flow numbers including the total ventilation rate, the air change rate, ventilation rate, air diffusion performance index, modified jet momentum number, two new flow numbers and three expressions of jet momentum ratio were investigated. A total number of 25 numerical experiments under isothermal flow conditions with four different geometrical arrangements (labelled A-D) were performed. The correlation equations derived from CFD were compared with those obtained from experimental studies. It is found that the jet momentum ratio RM2gives the equation with the best correlation coefficient and so is recommended for ventilation design.
Original languageEnglish
Pages (from-to)276-288
Number of pages13
JournalIndoor and Built Environment
Issue number5-6
Publication statusPublished - 1 Jan 1998


  • Computational fluid dynamics
  • Ventilation

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health


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